Victorian Police Minister Lisa Neville paid tribute to the two junior police officers who were confronted by Shire Ali.

"They were backed up pretty quickly … but those two police officers showed incredible courage, bravery," she said.

"I have met many new recruits and graduates, and they are still learning, and what they showed [on Friday] is that they have the right training, the right state of mind and they executed that to protect Victorians very quickly and as appropriate.

"I have a huge admiration for both of them.

"It would have been a pretty confronting situation … my thoughts and prayers are with them as well and their families as they deal with this."

Premier urges Victorians to celebrate Armistice Day

As investigations into the attack continue, Victorian Premier Daniel Andrews is urging people to show up en masse for Armistice Day events.

While police have stressed there was no ongoing threat after Friday's attack, security has been stepped up around Melbourne as the city prepares to commemorate 100 years since the signing of the armistice to end World War I.

Events will take place this morning at the Shrine of Remembrance, while around the city, 100 buglers will line the streets of the CBD to sound the last post at 11:00am.

Mr Andrews said the best way to condemn the violence was to commemorate those who had defended our freedom.

"Remembrance Day is so, so, so important, but the centenary year is particularly important," Mr Andrews said.

"[It's] an opportunity for us to affirm those values and say thank you to those who paid the ultimate sacrifice for the freedoms we enjoy.

"I'll be at the shrine and I would encourage all Victorians to be involved."